cb_add_fallbacks

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries full responsibility for behavioral disclosure. It only says fallback strategies will be added, without explaining whether this modifies existing files, requires specific authentication, affects current circuit breaker behavior, or is idempotent. For a mutation-style tool, this is a meaningful transparency gap.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence with no filler or repetition. It is front-loaded with the verb and resource, making it quick for an agent to parse.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with no annotations and no output schema, the description is too thin to fully orient an agent. It does not clarify the meaning of the fallback_type enum values, the role of the language parameter, the necessity of api_key, or how this tool relates to the many nearby circuit-breaker and fallback tools in the sibling list.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the input schema already documents all four parameters. The description adds no extra meaning about relationships between parameters, how fallback_type interacts with language, or when api_key is needed, but the schema already carries the burden adequately.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific action ('Add fallback strategies') and a clear resource ('circuit breaker implementation'), so an agent can grasp the tool's core function immediately. It does not explicitly differentiate itself from closely related siblings like cb_configure_thresholds or cb_generate_pattern, but the resource and action are specific enough to avoid gross confusion.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is given about when to use this tool versus alternatives such as cb_configure_thresholds, retry_add_circuit_breaker, or error_generate_fallback. There are no prerequisites, conditions, or exclusions stated, leaving the agent to infer usage solely from the name.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.